package com.black.gateway.filter;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilter;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * @Author: Young
 * @CreateTime: 2025-08-07
 * @Description: 全局filter
 * @Version: 1.0
 */
@Slf4j
@Component
public class RtGlobalFilter implements GlobalFilter, Ordered {

    // 添加构造函数日志
    public RtGlobalFilter() {
        log.info("RtGlobalFilter初始化成功");
    }

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        String uri = request.getURI().getPath();
        long start = System.currentTimeMillis();
        log.info("请求【{}】开始：时间：{}",uri,start);
        // 记录请求使用时长
        Mono<Void> filter = chain.filter(exchange)
                .doFinally((res)->{
            long end = System.currentTimeMillis();
            log.info("请求【{}】结束：时间：{}，耗时：{}",uri,end,end-start);
        });
        return filter;
    }

    @Override
    public int getOrder() {
        return 0;
    }
}
